CS20120B Current Sensor Equivalent & Substitute Parts

Part Overview

The CS20120B is an active, open-loop current sensor manufactured by CUI Devices, designed for bidirectional AC current measurement up to 20A. This module-type sensor delivers ratiometric voltage output and operates across a frequency range of DC to 40kHz with ±2.4% accuracy. The part is ROHS3 compliant and REACH unaffected, confirming its suitability for modern electronic applications.

Substitute parts become necessary when application requirements differ from the primary specification, such as reduced current-sensing capacity, inventory constraints, or design modifications that permit operation within alternative parameter ranges.

Substiute Parts

CS20120B

CUI DevicesIn Stock: 834CS20120B Datasheet

Current PartRFQ

CS10120B

CUI DevicesIn Stock: 1212CS10120B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The CS10120B qualifies as a parametric equivalent within the CSXX120B series based on the following substitution criteria:

Matching Parameters (Substitution Basis):

• Identical sensor type: Open Loop
• Identical output configuration: Ratiometric, Voltage
• Identical frequency range: DC ~ 40kHz
• Identical linearity specification: ±0.5%
• Identical accuracy specification: ±2.4%
• Identical supply voltage range: ±11.4V ~ 12.6V
• Identical response time: 3µs
• Identical maximum supply current: 25mA
• Identical operating temperature range: -10°C ~ 75°C
• Identical polarization: Bidirectional
• Identical mounting type: Through Hole
• Identical package type: Module
• Identical series designation: CSXX120B
• Identical product status: Active
• Identical compliance certifications: ROHS3, REACH Unaffected

Differing Parameter (Current-Sensing Capacity):

• CS20120B: 20A sensing range
• CS10120B: 10A sensing range

The CS10120B operates within identical electrical and mechanical constraints, differing only in maximum current-sensing capacity. This substitution is valid for applications requiring current measurement up to 10A.

Parameter Comparison

Engineering Selection Recommendations

Both the CS20120B and CS10120B maintain active product status with full ROHS3 compliance and REACH unaffected certification. Selection between these parts depends solely on the maximum current-sensing requirement of the application.

The CS20120B is the appropriate selection for applications requiring current measurement up to 20A. The CS10120B is suitable for applications where the maximum measured current does not exceed 10A. Both parts share identical electrical performance characteristics, supply requirements, response time, and operating conditions.

No performance degradation occurs when substituting the CS10120B in applications designed for 10A or lower current measurement. The identical ratiometric voltage output, frequency response, accuracy, and linearity ensure signal conditioning compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the CS10120B replace the CS20120B in all applications?

A: The CS10120B can replace the CS20120B only in applications where the maximum current to be measured does not exceed 10A. Both sensors deliver identical output characteristics, accuracy, and response time. Applications requiring measurement of currents between 10A and 20A require the CS20120B.

Q: Are the output signals from both sensors compatible with the same signal conditioning circuitry?

A: Yes. Both the CS20120B and CS10120B produce ratiometric voltage output with identical accuracy (±2.4%), linearity (±0.5%), and response time (3µs). Signal conditioning circuits designed for one sensor function identically with the other, provided the current range does not exceed 10A.

Q: Do both sensors require identical supply voltage?

A: Yes. Both the CS20120B and CS10120B operate with the same supply voltage range of ±11.4V to ±12.6V and draw a maximum of 25mA. Power supply design and filtering requirements are identical.

Q: Are the mounting footprints identical between these sensors?

A: Yes. Both sensors use through-hole mounting in module package configuration. PCB layout and mechanical integration are identical.

Q: What is the frequency response difference between these sensors?

A: There is no frequency response difference. Both sensors operate across the identical DC to 40kHz frequency range, making them suitable for the same AC current measurement applications.

Q: Can either sensor measure current in both directions?

A: Yes. Both the CS20120B and CS10120B feature bidirectional polarization, enabling measurement of current flow in both positive and negative directions.

Q: Are there any temperature operating range differences?

A: No. Both sensors operate across the identical temperature range of -10°C to 75°C. Thermal performance and compensation are equivalent.